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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/NonnullOwnPtr.h>
#include <AK/Optional.h>
#include <Kernel/UnixTypes.h>
#include <LibC/sys/arch/i386/regs.h>
namespace Kernel {
class ThreadTracer {
public:
static NonnullOwnPtr<ThreadTracer> create(pid_t tracer) { return make<ThreadTracer>(tracer); }
pid_t tracer_pid() const { return m_tracer_pid; }
bool has_pending_signal(u32 signal) const { return m_pending_signals & (1 << (signal - 1)); }
void set_signal(u32 signal) { m_pending_signals |= (1 << (signal - 1)); }
void unset_signal(u32 signal) { m_pending_signals &= ~(1 << (signal - 1)); }
bool is_tracing_syscalls() const { return m_trace_syscalls; }
void set_trace_syscalls(bool val) { m_trace_syscalls = val; }
void set_regs(const RegisterState& regs);
void set_regs(const PtraceRegisters& regs) { m_regs = regs; }
bool has_regs() const { return m_regs.has_value(); }
const PtraceRegisters& regs() const
{
ASSERT(m_regs.has_value());
return m_regs.value();
}
explicit ThreadTracer(pid_t);
private:
pid_t m_tracer_pid { -1 };
// This is a bitmap for signals that are sent from the tracer to the tracee
// TODO: Since we do not currently support sending signals
// to the tracee via PT_CONTINUE, this bitmap is always zeroed
u32 m_pending_signals { 0 };
bool m_trace_syscalls { false };
Optional<PtraceRegisters> m_regs;
};
}
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